Background

The Eurocode 5 (EC5) design equation for checking against splitting failure due to loading perpendicular to the grain states that the design splitting load of one connector is:

(1)

In Eq. (1), the term under the square root indicates that linear elastic fracture mechanics (LEFM) theory is the basis of the expression. Situations covered by are depicted in Figure 1.

Figure 1. Design situations where Eq. (1) is applicable, according to EC5.

Aim

The aim of the project is to investigate whether the proposed design approach of EC5 is relevant for the cases indicated by the code, and in which cases it might not be relevant. The influence of e.g. loading angle α (see Figure 1) and the arrangement of fasteners are of special interest.

Main tasks

The work includes:

reviewing relevant experimental studies (if any) and compiling information on specimen geometry, material properties, loading and support conditions;
developing finite-element models of various joint geometries;
comparing numerical predictions with experimental results (if available)
comparing predicted capacities with the EC5 design approach;

Method

The project combines a literature and database study with numerical modelling. Two-dimensional finite-element models will be used, primarily together with linear-elastic fracture-mechanics approaches.

Research questions

Is the proposed EC5 design approach relevant?

What are possible limitations for its use (joint types and geometries, loading situations).

Our division

We at the Division of Structural Mechanics are driven by understanding engineering problems and conducting research that contributes to solving societal challenges. We offer a good study and work environment, good team spirit with dedicated employees and joint “fika” every day. We have a strong focus on high-quality teaching and research. We are proud to belong to a university that is ranked among the top 100 in the world and we enjoy the international environment in which we operate.

Contact

Erik Serrano, Professor, Division of Structural Mechanics, LTH - e rik.serrano@construction.lth.se
Henrik Danielsson, Associate Professor, Division of Structural Mechanics, LTH - henrik.danielsson@construction.lth.se